Do not wait! Secure your free deck estimate and design session today.
Do not wait! Secure your free deck estimate and design session today.
Do not wait! Secure your free deck estimate and design session today.
COMPOSITE DECKING BUILT TO LAST IN WEST WALES
With over 15 years of experience, we design and build composite decks that withstand Swansea’s coastal weather — durable, low-maintenance, and beautifully crafted for your outdoor living space.
Top Rated Expert Deck Installers
Top Rated Expert Deck Installers
Top Rated Expert Deck Installers
Award-Winning Designs & Craftsmanship
Award-Winning Designs & Craftsmanship
Award-Winning Designs & Craftsmanship
14+ Years Building Outdoor Spaces Across the UK
14+ Years Building Outdoor Spaces Across the UK
14+ Years Building Outdoor Spaces Across the UK
5.0
Based On 21 Reviews
5.0
Based On 21 Reviews
5.0
Based On 12 Reviews
5.0
Based On 12 Reviews
Get Your Free Composite Decking estimate
SERVICE OVERVIEW
Composite Decking in West Wales That Thrives in Coastal Conditions
Composite decking isn’t just something we build — it’s the foundation for safe, modern outdoor living. Here in West Wales, that deck has to handle rain, wind, and salty air without falling apart.
Decks should elevate your home, not eat your weekends. That’s why we design every build around durability, anti-slip finishes, long-term stability, and a clean handcrafted finish that lasts.
Whether you're near Cardigan Bay or tucked away along the Carmarthenshire coastline, our decking systems are built to perform, built to last, and built to transform your outdoor space.
offering proven solutions
Common Decking Problems We
Solve in West Wales
01
Composite boards that never rot, warp, or absorb moisture, built to stay solid through West Wales coastal rain.
01
Composite boards that never rot, warp, or absorb moisture, built to stay solid through West Wales coastal rain.
01
Composite boards that never rot, warp, or absorb moisture, built to stay solid through West Wales coastal rain.
02
UV-protected composite boards that hold colour against West Wales sun and salt air.
02
UV-protected composite boards that hold colour against West Wales sun and salt air.
02
UV-protected composite boards that hold colour against West Wales sun and salt air.
03
UV-protected composite boards that hold colour against West Wales sun and salt air.
03
UV-protected composite boards that hold colour against West Wales sun and salt air.
03
UV-protected composite boards that hold colour against West Wales sun and salt air.
04
Zero sanding. Zero sealing. Composite decking that only needs a rinse, once a year.
04
Zero sanding. Zero sealing. Composite decking that only needs a rinse, once a year.
04
Zero sanding. Zero sealing. Composite decking that only needs a rinse, once a year.
05
Reinforced, level deck subframes engineered for any garden slope or uneven ground in West Wales.
05
Reinforced, level deck subframes engineered for any garden slope or uneven ground in West Wales.
05
Reinforced, level deck subframes engineered for any garden slope or uneven ground in West Wales.
BENEFITS YOU GET
What's Included in Every Project
When you choose Simon Thomas Deck & Design, you get a complete, hassle-free installation:
Personal design consultation and precise site measurement
Personal design consultation and precise site measurement
Premium composite decking boards and heavy-duty subframe installation
Premium composite decking boards and heavy-duty subframe installation
Optional upgrades: LED lighting, modern railings, or glass balustrades
Optional upgrades: LED lighting, modern railings, or glass balustrades
Fully insured workmanship with tidy, respectful installation
Fully insured workmanship with tidy, respectful installation
Post-installation inspection to ensure every detail is perfect
Post-installation inspection to ensure every detail is perfect
what makes us unique
Why West Wales Homeowners Choose Us
Over 15 years building composite decks in Swansea — built to withstand coastal weather.
Over 15 years building composite decks in Swansea — built to withstand coastal weather.
Over 15 years building composite decks in Swansea — built to withstand coastal weather.
Precision installations that don't just meet standards — they set them. Every deck is built like it's our own.
Precision installations that don't just meet standards — they set them. Every deck is built like it's our own.
Precision installations that don't just meet standards — they set them. Every deck is built like it's our own.
From Mumbles to Morriston, we've transformed gardens across Swansea and the Gower Peninsula.
From Mumbles to Morriston, we've transformed gardens across Swansea and the Gower Peninsula.
From Mumbles to Morriston, we've transformed gardens across Swansea and the Gower Peninsula.
Give me a call or fill out the form. We'll arrange a convenient time to visit your property and discuss your vision.
Give me a call or fill out the form. We'll arrange a convenient time to visit your property and discuss your vision.
Give me a call or fill out the form. We'll arrange a convenient time to visit your property and discuss your vision.
We arrive on time, work efficiently, & leave your garden cleaner than we found. No shortcuts & mess.
We arrive on time, work efficiently, & leave your garden cleaner than we found. No shortcuts & mess.
We arrive on time, work efficiently, & leave your garden cleaner than we found. No shortcuts & mess.
Reviews
Trusted by Homeowners
Across Swansea & West Wales
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe, overall we would highly recommend Simon who is a true professional in his trade.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money compared to traditional decking. I would highly recommend Simon.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe, overall we would highly recommend Simon who is a true professional in his trade.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money compared to traditional decking. I would highly recommend Simon.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe, overall we would highly recommend Simon who is a true professional in his trade.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money compared to traditional decking. I would highly recommend Simon.
Nick Finch
faqs
frequently asked questions
Do I need to seal or repaint composite decking every year?
No. Composite doesn’t need sanding, painting, or sealing, even with West Wales weather.
What’s the best way to clean composite decking?
Just mild soapy water and a scrub once or twice a year to remove dirt or algae.
How long will composite decking last in coastal rain?
High-grade boards can last decades because they don’t take in water or break down.
Will composite decking handle all the rain we get without turning green or swelling?
Yes. Composite boards don’t soak up water, so they don’t swell, rot, or go green like wood does.
Do I need to seal or repaint composite decking every year?
No. Composite doesn’t need sanding, painting, or sealing, even with West Wales weather.
What’s the best way to clean composite decking?
Just mild soapy water and a scrub once or twice a year to remove dirt or algae.
How long will composite decking last in coastal rain?
High-grade boards can last decades because they don’t take in water or break down.
Will composite decking handle all the rain we get without turning green or swelling?
Yes. Composite boards don’t soak up water, so they don’t swell, rot, or go green like wood does.
Do I need to seal or repaint composite decking every year?
No. Composite doesn’t need sanding, painting, or sealing, even with West Wales weather.
What’s the best way to clean composite decking?
Just mild soapy water and a scrub once or twice a year to remove dirt or algae.
How long will composite decking last in coastal rain?
High-grade boards can last decades because they don’t take in water or break down.
Will composite decking handle all the rain we get without turning green or swelling?
Yes. Composite boards don’t soak up water, so they don’t swell, rot, or go green like wood does.
contact us
Ready to Upgrade Your Outdoor Space?
If your old timber deck is swelling from rain, going green from algae, or slippery after every storm, it's time for an upgrade.
We design and install composite boards that don't absorb water, don't rot, and don't need constant sealing to survive the season.
Built for real West Wales outdoors strong through rain, safer underfoot, cleaner looking, lasting for years, not months.
LOCATIONS
Proudly Serving
Swansea & West Wales
I'm proud to bring award-winning deck design and installation to homeowners throughout the region
Primary Service Areas
Swansea
Crosshands
Tenby
Carmarthen
Saundersfoot
Pembroke Dock
Ammanford
Plus all of West Wales
Not sure if I cover your area?
Primary Service Areas
Swansea
Crosshands
Tenby
Carmarthen
Saundersfoot
Pembroke Dock
Ammanford
Plus all of West Wales
Not sure if I cover your area?
Primary Service Areas
Swansea
Crosshands
Tenby
Carmarthen
Saundersfoot
Pembroke Dock
Ammanford
Plus all of West Wales
Not sure if I cover your area?